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8. Chuck jams on
lathe spindle
This is a common problem with fixtures on a lathe.
Use piece of wood & knock against base of pinion
gear in anticlockwise direction to jar loose from
spindle. To help prevent it try a plastic or fibre
washer between insert/chuck and spigot shoulder
of a spindle. Use of washer could affect accuracy.
9. Woodworm
screw creeps
forward or is not
seated properly
in chuck
Make sure woodworm screw boss is placed
correctly between jaw slides and behind jaws. See
Page 9
10. Wooden
spigot shifts
during turning
Check that the spigot area is made correctly for
jaws to grip. Check that the spigot is not oversize.
See spigot operation instruction Page 11. Use
careful chisel techniques that do not exert too
much pressure. Irregular rough wood blanks need
to be checked to see whether there is enough jaw
contact.
11. Wood blank
does not seat
properly in
internal dovetail
mounting
Check the angle of the dovetail recess made is the
same angle as the jaws. Make sure the bottom of
the recess is flat and square to face. See dovetail
operation Page 10. Check that the bowl is not
incorrectly riding on the flat shoulder of jaws behind
the dovetail.
